simple不运行
syms x1 x2 x3 x4 x5 x6 x7 x8 x9 x10;a=x1+x3*cos(40*x10);
b=x2-x3*sin(40*x10);
t=2*b*x4;
g=-2*a*x4;
h=x4^2+a^2+b^2-x5^2;
e=2*atan(((t^2+g^2-h^2)^(1/2)-t)/((t^2+g^2-h^2)^(1/2)+t));
c=a+x4*cos(e);
d=b+x4*sin(e);
m=a+x7*sin(e+x9);
n=b+x7*sin(e+x9);
q=asin((m+x8)/x6);
p=n+x6*cos(q);
f=diff(p,x10,2);
>> simplify(f);
>> v=simplify(f);
>> y=simple(v)
请大家看下有问题吗，怎么不运行 有时侯符号运算确实会死循环
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